16221898 has 16 divisors (see below), whose sum is σ = 30337344. Its totient is φ = 6320160.

The previous prime is 16221889. The next prime is 16221901. The reversal of 16221898 is 89812261.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52515 + ... + 52822.

It is an arithmetic number, because the mean of its divisors is an integer number (1896084).

Almost surely, 2^16221898 is an apocalyptic number.

16221898 is a deficient number, since it is larger than the sum of its proper divisors (14115446).

16221898 is a wasteful number, since it uses less digits than its factorization.

16221898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105357.

The product of its digits is 13824, while the sum is 37.

The square root of 16221898 is about 4027.6417417640. The cubic root of 16221898 is about 253.1437574475.

The spelling of 16221898 in words is "sixteen million, two hundred twenty-one thousand, eight hundred ninety-eight".